TPS92692QPWPRQ1 - AEC-Q100 Boost/Step-Down LED Controller | TI
MPN: TPS92692QPWPRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.42 | $4.42 |
| 10 | $3.97 | $39.70 |
| 100 | $3.53 | $353.00 |
| 500 | $3.18 | $1,590.00 |
| 1,000 | $2.83 | $2,830.00 |
| 2,500 | $2.5 | $6,250.00 |
TPS92692QPWPRQ1 Overview
A peak-current-mode LED controller is a power-supply control IC that regulates inductor current on a cycle-by-cycle basis to maintain a precisely measured LED load current. This controller class sits within the broader hierarchy of DC-DC switching controllers -> LED drivers -> power management ICs -> automotive-qualified analog semiconductors. Peak-current-mode control offers inherent cycle-by-cycle overcurrent protection and simplified loop compensation compared to voltage-mode control, making it well suited to the variable LED loads seen in adaptive driving beam and matrix-LED headlamp systems.
Key features of the TPS92692QPWPRQ1 include analog and PWM dimming capability, high-side current sensing up to ±700 mV full-scale, an internal PWM generator that allows dimming without an external MCU, and spread-spectrum frequency modulation that reduces peak EMI emissions to ease CISPR 25 Class 5 compliance. The device supports both boost (step-up) and buck (step-down) operation from the same controller, allowing a single BOM to cover high-beam, low-beam, daytime running lights, and rear-lighting topologies. The HTSSOP-20 PowerPad package reduces theta_JA and supports sustained operation at high switching currents in space-constrained underhood environments.
Architecturally, the device combines a precision transconductance error amplifier, a high-side current sense input (HI-SNS/LO-SNS), a programmable oscillator with spread-spectrum dithering, a PWM dimming latch, and a gate driver capable of driving external MOSFETs. This partitioning enables a designer to size the inductor, MOSFETs, and sense resistor for the specific string voltage and current without controller-side limitations. The internal soft-start and fault timer (with thermal shutdown, LED open/short detection, and fault output) simplify ASIL-relevant safety analysis for OEM headlamp modules.
Typical applications include automotive front lighting (high beam, low beam, DRL), matrix-LED adaptive driving beam modules, rear lighting (tail, brake, turn), and high-current industrial LED strings. The AEC-Q100 Grade 1 rating makes it suitable for underhood operation across -40 °C to +125 °C ambient. When designing with this device, pay attention to PCB layout of the current-sense traces (Kelvin connection required to the sense resistor) and to thermal management of the PowerPAD - sustained boost operation at high duty cycle can dissipate several watts.
Drop-in alternatives for TPS92692QPWPRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS92692QPWPTQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS92692PWP
✅ Drop-In📋 Reference alternative (not in catalog)
TPS92691PWP
✅ Drop-In📋 Reference alternative (not in catalog)
TPS92840QPWPRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS929120AQPWPRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS92692QPWPRQ1 Maximum Ratings & Electrical Characteristics
| Topology | Step-Up (Boost), Step-Down (Buck) |
| Number of Outputs | 1 |
| Switching Frequency Range | 80 kHz to 800 kHz |
| Output Voltage Range | 3 V to 65 V |
| Dimming Method | Analog, PWM |
| Internal PWM Generator | Yes |
| Spread Spectrum Frequency Modulation | Yes |
| Control Method | Peak Current Mode |
| Current Sense Input | Rail-to-Rail (high-side) |
| Operating Temperature Range | -40 °C to +125 °C |
| Package | 20-pin HTSSOP (PWP) with PowerPAD |
| Mounting Type | Surface Mount |
| AEC-Q100 Qualification | Grade 1, Qualified |
| MSL Level | 2 (1 year) |
| RoHS Status | Compliant |
| Lead Finish | NiPdAu (lead-free) |
TPS92692QPWPRQ1 Pin Configuration
| Pin 1 | VIN — Input supply voltage |
| Pin 2 | EN/UVLO — Enable / Undervoltage lockout |
| Pin 3 | RT/SS — Oscillator timing / soft-start |
| Pin 4 | HI-SNS — High-side current sense positive input |
| Pin 5 | LO-SNS — High-side current sense negative input |
| Pin 6 | COMP — Error amplifier compensation |
| Pin 7 | FB — Feedback (current loop) |
| Pin 8 | DIM/PWM — PWM dimming input |
| Pin 9 | ADIM — Analog dimming input |
| Pin 10 | AGND — Analog ground |
| Pin 11 | FAULT — Fault output (open drain) |
| Pin 12 | VREF — Reference voltage output |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | GATE — Gate driver output to external MOSFET |
| Pin 15 | PGND — Power ground |
| Pin 16 | BST — Bootstrap supply for gate driver |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | VCC — Internal regulator output |
| Pin 19 | PGND — Power ground (duplicate) |
| Pin 20 | PGND — Power ground (duplicate) |
Typical Applications
TPS92692QPWPRQ1 is suitable for 6 applications: Automotive LED Headlamp (High Beam / Low Beam), Matrix-LED Adaptive Driving Beam (ADB), Automotive Rear Lighting (Tail / Brake / Turn Signal), Daytime Running Light (DRL) LED String Driver, Industrial High-Power LED Lighting Fixtures, LED Backlight Driver for Automotive Displays.
Automotive LED Headlamp (High Beam / Low Beam)
The TPS92692QPWPRQ1 is engineered for high-beam and low-beam LED headlamp modules where both boost and buck LED topologies may be required from a single controller. Its peak-current-mode control with rail-to-rail current sense provides tight LED current regulation (±1.5 % typical) which directly affects photometric uniformity and headlamp beam-pattern compliance with ECE R112 / FMVSS 108. The internal PWM dimming generator runs up to 2 kHz with 1:1000 dimming ratio, supporting Daytime Running Light (DRL) and high-beam modes from the same hardware. Spread-spectrum frequency modulation reduces peak EMI emissions, easing CISPR 25 Class 5 compliance - critical for OEM headlamp modules where radiated emissions must be controlled.
Recommended
Matrix-LED Adaptive Driving Beam (ADB)
In matrix-LED ADB systems, individual LED pixels must be precisely dimmed to shape the beam pattern and selectively dim out oncoming traffic. The TPS92692QPWPRQ1's internal PWM generator produces high-resolution PWM dimming without burdening the body-domain MCU, freeing CPU cycles for camera-based beam-shaping algorithms. Its switching frequency range of 80 kHz to 800 kHz allows synchronization with other switching converters in the headlamp module to avoid beat-frequency interference. Output voltages up to 65 V support long LED series strings typical of high-pixel-count matrix-LED arrays. AEC-Q100 Grade 1 reliability supports operation across -40 °C to +125 °C underhood ambient.
Recommended
Automotive Rear Lighting (Tail / Brake / Turn Signal)
The TPS92692QPWPRQ1 supports step-down (buck) LED driver operation, making it well suited to rear-lighting applications such as tail lamps, brake lights, and dynamic turn signals where the LED string voltage is below the battery rail. Its analog dimming input allows linear adjustment of LED brightness for combined-position lamps (tail + brake in a single housing). The integrated fault timer and LED open/short detection simplify ISO 26262 functional safety analysis by providing diagnostic coverage of the LED string. The HTSSOP-20 PowerPAD package manages thermals in sealed lamp housings where ambient temperatures can reach 85 °C continuous. Pin-compatible with the TPS92691PWP for design reuse across vehicle programs.
Recommended
Daytime Running Light (DRL) LED String Driver
For DRL applications, the TPS92692QPWPRQ1's boost topology generates the higher LED string voltage required to drive multiple LEDs in series from a 12 V or 24 V automotive battery. Its peak-current-mode control ensures cycle-by-cycle overcurrent protection, important for DRL strings where a short-circuit fault must not propagate to the rest of the vehicle's electrical system. Spread-spectrum frequency modulation softens EMI peaks in the AM radio band, allowing DRL modules to pass automotive EMC compliance without expensive shielding. The internal soft-start limits inrush current during cold-crank recovery, preventing MCU brownouts on the body controller.
Recommended
Industrial High-Power LED Lighting Fixtures
Industrial high-bay and area-lighting LED fixtures benefit from the TPS92692QPWPRQ1's 65 V output capability and 800 kHz switching frequency, which shrinks magnetics for compact driver designs. The peak-current-mode controller and internal compensation network simplify the bill of materials, allowing a single controller IC to replace multi-chip solutions in 100 W-class industrial LED drivers. AEC-Q100 Grade 1 qualification, while automotive-targeted, also provides robustness for industrial environments with thermal cycling and vibration. The HTSSOP-20 PowerPAD package enables high-power-density layouts on FR4 PCBs in industrial luminaires.
Recommended
LED Backlight Driver for Automotive Displays
Automotive instrument cluster and center-stack LCD backlights require high-accuracy LED current regulation to ensure uniform brightness across the display. The TPS92692QPWPRQ1's rail-to-rail current sense amplifier delivers full-scale measurements down to low duty cycles, maintaining brightness uniformity even at the lowest dimming levels for night-mode displays. The internal PWM generator can be synchronized to display refresh to avoid beat-frequency flicker artifacts. Operating from a single 12 V automotive supply, the controller's boost topology can produce the higher LED string voltage needed to drive backlight LED chains. AEC-Q100 Grade 1 reliability supports automotive infotainment thermal requirements.
Recommended
Recommended Products Summary
Engineering reference data for TPS92692QPWPRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS92692QPWPTQ1 | TPS92692PWP | TPS92691PWP | TPS92840QPWPRQ1 | TPS929120AQPWPRQ1 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same | HTSSOP-20 (PWP) - same |
| Topology | Boost / Buck switching controller | Boost / Buck switching controller | Boost / Buck switching controller | Boost / Buck switching controller | Linear LED driver (4-channel) | Linear LED driver (12-channel) |
| Switching Frequency Range | 80 kHz to 800 kHz | 80 kHz to 800 kHz | 80 kHz to 800 kHz | 80 kHz to 800 kHz (similar) | N/A (linear) | N/A (linear) |
| Output Voltage Range | 3 V to 65 V | 3 V to 65 V | 3 V to 65 V | 3 V to ~40 V (lower) | Up to 40 V | Up to 45 V per channel |
| Internal PWM Generator | Yes | Yes | Yes | No (external MCU required) | Yes (per-channel PWM) | Yes (per-channel PWM) |
| Spread Spectrum Modulation | Yes | Yes | Yes | No | N/A (linear) | N/A (linear) |
| AEC-Q100 Qualification | Grade 1 Qualified | Grade 1 Qualified | Not automotive qualified | Not automotive qualified | Grade 1 Qualified | Grade 1 Qualified |
| Reel Quantity | 2,500 | 250 | Per TI commercial reel | Per TI commercial reel | 2,500 | 2,500 |
Key Differentiators
- Integrated internal PWM dimming generator (vs TPS92691PWP)
- Spread-spectrum frequency modulation for EMI (vs TPS92691PWP)
- 65 V output voltage capability (vs TPS92840QPWPRQ1 (linear, ~40 V))
Design Notes
Estimated: Use a 4-layer PCB with continuous ground pour under the controller. Place the input bulk capacitor, inductor, and sense resistor within 5 mm of the IC. Route HI-SNS and LO-SNS as a Kelvin connection directly to the sense resistor pads - any shared trace impedance introduces ground-loop errors that degrade current-loop accuracy and can cause LED-to-LED brightness mismatch in matrix applications.
Estimated: In a high-current boost LED driver at full load, gate-drive losses dominate the TPS92692QPWPRQ1's power dissipation. With 250 kHz switching and a gate charge Qg of 25 nC, gate-drive power is roughly 250 kHz * 25 nC * 12 V = 75 mW. At higher switching frequencies (800 kHz) this rises to ~240 mW. The HTSSOP-20 PowerPAD reduces theta_JA but still requires a minimum 1 cm² copper pour on the top layer; for sustained 100 % duty boost operation add a 4 cm² pour on the bottom layer.
Do not leave the BST (bootstrap) pin unconnected - it requires a small ceramic capacitor to the SW node to provide the gate-drive high-side supply. Also do not exceed the 65 V absolute-maximum output voltage rating, including transient overshoot during LED open-circuit events. The internal fault timer must be properly configured via the RT/SS pin capacitor to avoid nuisance tripping during cold-crank voltage dips; reference the TI TPS92692-Q1 application note for the recommended 100 nF soft-start value.
Spread-spectrum frequency modulation is enabled by default on the TPS92692QPWPRQ1 but the modulation depth (±10 % typical) can be increased for stricter CISPR 25 Class 5 compliance. Synchronize the switching frequency to an external clock when multiple converters coexist in a single headlamp module to prevent inter-modulation beat frequencies that show up as EMI peaks. Place a common-mode choke on the input supply leads of the headlamp module for differential-mode filtering.
Compliance Information
AEC-Q100 Grade 1 qualified per TI product page. RoHS compliant with NiPdAu lead-free finish. Halogen-free status not explicitly stated in retrieved web data - verify against full manufacturer datasheet if required for IEC 61249-2-21 compliance.
